Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing and extracting theabrownin by using tea leaves as raw material

A technology of theabrownin and tea, which is applied in the field of preparation and extraction of theabrownin, can solve the problems of high energy consumption cost, less theabrownin, complex components, etc., to overcome the variety of organic solvents, reduce production costs, and improve recovery rate Effect

Active Publication Date: 2015-06-17
云南唐人中创科学技术研究院
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few production and preparation technologies of theabrownin. The main methods are to use fresh tea leaves as raw materials to adopt fermentation method or to extract and purify various organic solvents from black tea such as Pu'er tea. Due to the complex composition of raw materials, these methods The removal of impurities and organic solvents in the downstream of the preparation process, the purification of the target product, etc. have cumbersome processes, high energy costs, and serious environmental pollution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing and extracting theabrownin by using tea leaves as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing and extracting theabrownin from tea leaves, comprising the following steps:

[0024] (1) Take 20g of ordinary green tea (or other tea varieties), grind it into flakes, put it into a beaker, inject 200ml of 90-100% pure water and heat it to keep the constant temperature for 60min, then extract the liquid, and repeat the extraction once under the same conditions;

[0025] (2) heating and concentrating the above-mentioned 400ml extract to 150ml;

[0026] (3) Add 150ml of concentrated solution from the previous step to 150ml of chloroform solution for extraction, leaving 150ml of the lower aqueous layer;

[0027] (4) inject 150ml of the water layer in the previous step into the airtight melting vessel and carry out the oxidative polymerization reaction for 60min;

[0028] (5) After the oxidative polymerization reaction is completed, it is distilled and dried to obtain 5.35 g of solid theabrownin fine product with more than 80%.

Embodiment 2

[0030] A method for preparing and extracting theabrownin from tea leaves, comprising the following steps:

[0031] (1) Take 20g of ordinary green tea (or other tea varieties), grind it into flakes, put it into a beaker, inject 100ml of 70-80% pure water, and heat it to keep the constant temperature for 40min, then extract the liquid, and repeat the extraction once under the same conditions;

[0032] (2) The above-mentioned 200ml extract is heated and concentrated to 150ml;

[0033] (3) Add 150ml of concentrated solution from the previous step to 150ml of chloroform solution for extraction, leaving 150ml of the lower aqueous layer;

[0034] (4) inject 150ml of the water layer in the previous step into the airtight melting vessel and carry out oxidative polymerization reaction for 30min;

[0035] (5) After the oxidative polymerization reaction is completed, distill and dry to obtain 4.45 g of solid theabrownin fine product with a theabrownin content of more than 80%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing and extracting theabrownin by using tea leaves as a raw material. The method comprises the steps of (1) crushing the tea leaves, putting the crushed tea leaves into an extraction container, and injecting purified water for soaking to obtain extract liquor for later use; (2) cooling the extract liquor, and filtering the extract liquor by using a straight film to remove fiber impurities; (3) performing membrane concentration; (4) extracting a dichloromethane solution at normal temperature to remove caffeine, and taking a lower-level water layer; (5) injecting the lower-level water layer into the container to perform an oxidative polymerization reaction; (6) performing vacuum concentration on the solution to obtain a concentrated solution with the concentration of 20-50%; (7) performing spray drying on the concentrated solution to obtain dry powder; and (8) putting the obtained dry powder into a CO2 supercritical environment to remove trace impurities and trace organic solvents, and then drying to ensure that the water content of the dry powder is less than 4%, thereby obtaining a solid theabrownin product. The method disclosed by the invention has the advantages that the content of theabrownin is increased, the manufacturing cost is reduced, the recovery rate is increased, and the problems that a variety of organic solvents are used in the prior art, the number of residual organic solvents is large and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of tea deep processing, in particular to a method for preparing and extracting theabrownin from tea leaves. Background technique [0002] Theabrownin can effectively reduce blood lipids, blood sugar and blood viscosity, and has a significant effect on the prevention of cardiovascular and cerebrovascular diseases and diabetes. It can be used as raw materials for food and health products, and has wide application prospects. At present, there are few production and preparation technologies of theabrownin. The main methods are to use fresh tea leaves as raw materials to adopt fermentation method or to extract and purify various organic solvents from black tea such as Pu'er tea. Due to the complex composition of raw materials, these methods In the downstream of the preparation process, the removal of impurities and organic solvents, and the purification of the target product are cumbersome, high energy costs, and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): A23F3/18A23F3/26
Inventor 张松波高毅杨戈白雄
Owner 云南唐人中创科学技术研究院